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UNC Chapel Hill Permit <br /> 3. Surface Water and Sediment Contamination <br /> The Permittee shall conduct a surface water investigation to characterize contamination <br /> in surface water bodies resulting from releases of hazardous constituents at the facility. <br /> The investigation may include, but not be limited to, the following information: <br /> a. A description of the horizontal and vertical extent of any plume(s) originating <br /> from the facility, and the extent of contamination in underlying sediments; <br /> b. The horizontal and vertical direction of contaminant movement; <br /> c. The contaminant velocity; <br /> d. An evaluation of the physical, biological and chemical factors influencing <br /> contaminant movement; <br /> e. An extrapolation of future contaminant movement; and <br /> f. A description of the chemistry of the contaminated surface waters and sediments. <br /> This includes determining the pH, total dissolved solids, specific contaminant <br /> concentrations, etc. <br /> The Permittee shall document the procedures used in making the above determinations. <br /> 4. Air Contamination <br /> The Permittee shall conduct an investigation to characterize gaseous releases of <br /> hazardous constituents into the atmosphere or any structures or buildings. This <br /> investigation may provide the following information: <br /> a. A description of the horizontal and vertical direction and velocity of contaminant <br /> movement; <br /> b. The rate and amount of the release; and <br /> c. The chemical and physical composition of the contaminant(s)released, including <br /> horizontal and vertical concentration profiles. <br /> The Permittee shall document the procedures used in making the above determinations. <br /> D. Potential Receptors <br /> The Permittee shall collect data describing the human populations and environmental systems <br /> that are susceptible to contaminant exposure from the facility. Chemical analysis of <br /> biological samples and/or data on observable effects in ecosystems may also be obtained as <br /> appropriate. The following characteristics shall be identified: <br /> B-12 <br />